P2.1 Motion Flashcards
State the equation linking distance, speed and time. Give appropriate units.
Distance (m) = Speed (m/s) x Time (s)
How can speed be calculated from a distance-time graph?
The speed is equal to the gradient of the graph.
What must be done to calculate speed at a given time from a distance-time graph for an accelerating object?
- Drawing a tangent to the curve at the required time.
- Calculating the gradient of the tangent
State the equeation for the average acceleration of an object. Give appropriate units.
Acceleration (m/s^2) = Change in velocity (m/s) / Time (s)
How can the distance travelled by an object be calculated from a velocity-time graph?
It is equal to the area under the graph
What is a scalar quantity?
- A quantity that only has a magnitude.
- A quantity that isn’t direction dependent
What is a vector quantity?
A quantity that has both a magnitude and an associated direction.
How can a vector quantity be drawn and what does it show?
- As an arrow.
- The length of the arrow represents the magnitude.
- The arrow points in the associated direction
Is a force a vector or a scalar quantity?
- Vector
- It has both a magnitude and an associated direction
Give three examples of vector quantities.
- Force
- Velocity
- Displacement
Give three examples of scalar quantities.
- Speed
- Temperature
- Time
- Mass
- Distance
How do you calculate average speed for non-uniform motion?
Average Speed (m/s) = Change in Distance (m) / Change in Time (s)
What piece of apparatus may be used to record the time taken for a very fast object to move a given distance?
Light Gates
